<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <h1>{{theme}}</h1>
  </div>
  <script src="./vue.js"></script>
  <script type="module">
    import Theme from './theme.js'
    new Vue({
      el:"#app",
      mixins:[Theme]
    })
  </script>
</body>
</html>